#include<stdio.h>
#include <unistd.h>

#include <stdlib.h>

#include <sys/types.h>
#include <sys/wait.h>



int main()
{
  pid_t id = fork();

  if(id == 0)
  {
    execl("/usr/bin/ls","ls","-a","-l",NULL);

    exit (0);
  }
  int statue = 0;
  pid_t rid = waitpid(id,&statue,0);

   printf("hello linux\n");
  return 0;
}



